Abstract: A piston for an internal combustion engine has a piston head and a piston skirt delimited by a lower skirt edge. The piston skirt has a working surface assigned to its major thrust side (DS) and a working surface assigned to its minor thrust side (GDS), and a zone is assigned to each of the two working surfaces, which zone proceeds from the lower skirt edge and is exposed to a maximal stress during operation of the internal combustion engine. The zone of the working surface assigned to the major thrust side (DS) and/or the zone of the working surface assigned to the minor thrust (GDS) side is provided with a coating that has grooves that run vertically.

Abstract: A piston for an internal combustion engine has a piston head and a piston skirt delimited by a lower skirt edge. The piston skirt has a working surface assigned to its major thrust side (DS) and a working surface assigned to its minor thrust side (GDS), and a zone is assigned to each of the two working surfaces, which zone proceeds from the lower skirt edge and is exposed to a maximal stress during operation of the internal combustion engine. The zone of the working surface assigned to the major thrust side (DS) and/or the zone of the working surface assigned to the minor thrust (GDS) side is provided with a coating that has grooves that run vertically.

Abstract: The invention relates to an oil scraper ring groove ring arrangement for pistons of internal combustion engines. The inventive arrangement comprises a disk that is provided with parallel flanks and a bearing surface having an asymmetrical crowned form with a vertex line extended over the periphery of the disc, with the disk being arranged in a ring groove of the piston with a ring groove side opposing the piston head and a ring groove side facing the piston head. The aim of the invention is to achieve an improved oil scraping action compared to that of prior art, while reducing the friction and the abrasion in such a way that it is radially outwardly inclined to the outer diameter of the piston, the bearing surface of the disk being embodied in such a way that it corresponds to an almost worn end contour in the started engine state, and, when the oil scraper ring is mounted in the piston, the vertex line of the bearing surface is oriented in the direction of the ring groove side opposing the piston head.

Abstract: The invention relates to an oil scraper ring for pistons of internal combustion engines. The oil scraper ring comprises a disc that is provided with parallel flanks and a bearing surface having an asymmetrical crowned form with a vertex line extending over the periphery of the disc. A bracing spring arranged in a ring groove of the piston and comprising a spring groove side opposing the piston head and a spring groove side facing the piston head presses the disc radially against the friction and the abrasion of the bearing surface.

Abstract: A piston for an internal combustion engine has a piston head and a piston skirt spaced apart from the piston head by a ring-shaped recess. The piston has at least one pin bore for accommodating a piston pin. A ring-shaped circumferential cooling channel for a coolant is provided in the piston head, which channel is closed off by a cover ring that consists of at least two segments. At least one region of the cover ring projects at least partially into the clear opening of the at least one pin bore, in such a manner that the cover ring simultaneously forms the retaining element for the piston pin.

Abstract: A multipart oil wiping ring for pistons of internal combustion engines comprises two steel strip-type lamellae with parallel sides, the running surfaces of which are provided with a convexly asymmetric shape having a vertex line that extends across the circumference of the lamellae, and a bracing spring located between the lamellae. The bracing spring presses the lamellae in an axial direction against one respective side of an annular groove in the piston and in a radial direction against the cylinder wall.

Abstract: The invention relates to an oil scraper ring for pistons of internal combustion engines, said oil scraper ring comprising a disc (1) provided with a bearing surface (h) having an asymmetrical crowned form with a vertex line (3) extending over the periphery of the disc. Said disk (1) is arranged in a ring groove (7) of the piston and respectively has a ring groove side (6) opposing the piston head and a parallel ring groove side (5) facing the piston head. The aim of the invention is to achieve an improved oil scraping action compared to that of prior art, while reducing the friction and the abrasion of the bearing surface.

Abstract: A piston for an internal combustion engine has a piston head and a piston skirt spaced apart from the piston head by a ring-shaped recess. The piston has at least one pin bore for accommodating a piston pin. A ring-shaped circumferential cooling channel for a coolant is provided in the piston head, which channel is closed off by a cover ring that consists of at least two segments. At least one region of the cover ring projects at least partially into the clear opening of the at least one pin bore, in such a manner that the cover ring simultaneously forms the retaining element for the piston pin.

Abstract: The invention relates to an oil scraper ring for pistons of internal combustion engines, said oil scraper ring comprising a disc (1) provided with a bearing surface (h) having an asymmetrical crowned form with a vertex line (3) extending over the periphery of the disc. Said disk (1) is arranged in a ring groove (7) of the piston and respectively has a ring groove side (6) opposing the piston head and a parallel ring groove side (5) facing the piston head. The aim of the invention is to achieve an improved oil scraping action compared to that of prior art, while reducing the friction and the abrasion of the bearing surface.

Abstract: The invention relates to a multipart oil wiping ring for pistons of internal combustion engines, comprising two steel strip-type lamellae with parallel sides, the running surfaces of which are provided with a convexly asymmetric shape having a vertex line that extends across the circumference of the lamellae, and a bracing spring located between the lamellae, said bracing spring pressing the lamellae in an axial direction against one respective side of an annular groove in the piston and in a radial direction against the cylinder wall. The aim of the invention is to obtain an oil-wiping effect that is improved compared to prior art while reducing wear of the running surface.

Abstract: A fuel injection pump for internal combustion engines having a cup-shaped pump housing and a pump head enclosing the housing. The pump head has a cylinder in which a pump piston, which is set into simultaneous reciprocating and rotary motion by a cam drive, in the course of which it simultaneously acts as a distributor, encloses a pump work chamber that is filled with fuel upon an intake stroke and communicates with one of a plurality of injection lines upon the supply stroke. The resultant reaction forces and moments are supported according to the invention via a roller race supported directly on the pump head, and as a result the induction of force to the pump housing can be avoided.